Method and router for IPv4 network host access to IPv6 network host

Abstract

The present invention discloses a method and a router for IPv4 network host to access IPv6 network host. The method comprises the following steps that: an IPv4 network host sends an access request message to a router with network address conversion-protocol conversion function according to the address information of an IPv6 network host in an IPv4 network; the router gets the address information of the IPv6 network host in an IPv6 network according to the address information of the IPv6 network host in the IPv4 network, converts the access request message into a format suitable for the transmission in the IPv6 network, and sends the converted access request message to the IPv6 network host according to the address information of the IPv6 network host in the IPv6 network; the IPv6 network host processes the converted access request message, and sends an access response message to the IPv4 network host through the router, wherein, the router prefixes the access request message including the address information of the IPv4 network host in the IPv4 network, so as to generating the address information of the IPv4 network host in the IPv6 network.

Description

technical field [0001] The invention relates to the communication field, and more specifically relates to a method and a router for an IPv4 network host to access an IPv6 network host. Background technique [0002] At present, with the rapid development of the network, more and more problems are exposed in the IPv4 network, such as the lack of IPv4 addresses, the expansion of the routing table, security issues, etc., making it necessary for a new type of network to meet the needs of the Internet development of. At present, the IPv6 network has been developed to a certain extent, and it can effectively solve these problems. However, due to the large-scale application of the current IPv4 network, it needs a certain transition period to convert to the IPv6 network. In this transition period, IPv4 network and IPv6 network will coexist within a certain period of time. To solve the problem of communication among them, Network Address Translation-Protocol Translation (NAT-PT for...

AI Technical Summary

Problems solved by technology

In the current technology, when an IPv4 network host initiates access to an IPv6 network, the source address of the IPv4 packet is generally obtained through pre-configured static rules or dynamic rules to obtain an IPv6 address. -Before PT conversion, the IPv6 address after IPv4 address conversion must be known in advance, which cannot be realized in dynamic rules, because during dynamic rule address conversion, free addresses are selected from the address pool bound by dynamic rules for conversion , there is no one-to-one correspondence between IPv4 addresses and IPv6 addresses

If the one-to-one correspondence between IPv4 addresses and IPv6 addresses is implemented through the configuration of static rules, the configuration is complex, and there are many IPv4 addresses in the actual use environment, it is impossible to obtain IPv6 addresses by configuring static rules for each IPv4 address

[0005] Therefore, in an environment using NAT-PT, if the IPv6 address of the host address in the IPv4 network after NAT-PT conversion is to be known in advance, a mechanism is needed to meet this requirement, which has not been realized in the prior art. method of demand

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